UserManagerService.java revision 8bcd8411111c7199dd5cbd90748d34765fa35c84
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.pm; 18 19import android.app.Activity; 20import android.app.ActivityManager; 21import android.app.ActivityManagerNative; 22import android.app.IStopUserCallback; 23import android.app.admin.DevicePolicyManager; 24import android.content.BroadcastReceiver; 25import android.content.Context; 26import android.content.Intent; 27import android.content.pm.ApplicationInfo; 28import android.content.pm.PackageManager; 29import android.content.pm.PackageManager.NameNotFoundException; 30import android.content.pm.UserInfo; 31import android.graphics.Bitmap; 32import android.os.Binder; 33import android.os.Bundle; 34import android.os.Environment; 35import android.os.FileUtils; 36import android.os.Handler; 37import android.os.IUserManager; 38import android.os.Message; 39import android.os.ParcelFileDescriptor; 40import android.os.Parcelable; 41import android.os.Process; 42import android.os.RemoteException; 43import android.os.ServiceManager; 44import android.os.UserHandle; 45import android.os.UserManager; 46import android.os.storage.StorageManager; 47import android.os.storage.VolumeInfo; 48import android.system.ErrnoException; 49import android.system.Os; 50import android.system.OsConstants; 51import android.util.AtomicFile; 52import android.util.Log; 53import android.util.Slog; 54import android.util.SparseArray; 55import android.util.SparseBooleanArray; 56import android.util.TimeUtils; 57import android.util.Xml; 58 59import com.google.android.collect.Sets; 60 61import com.android.internal.annotations.VisibleForTesting; 62import com.android.internal.app.IAppOpsService; 63import com.android.internal.util.ArrayUtils; 64import com.android.internal.util.FastXmlSerializer; 65import com.android.internal.util.XmlUtils; 66 67import org.xmlpull.v1.XmlPullParser; 68import org.xmlpull.v1.XmlPullParserException; 69import org.xmlpull.v1.XmlSerializer; 70 71import java.io.BufferedOutputStream; 72import java.io.File; 73import java.io.FileDescriptor; 74import java.io.FileInputStream; 75import java.io.FileNotFoundException; 76import java.io.FileOutputStream; 77import java.io.IOException; 78import java.io.PrintWriter; 79import java.nio.charset.StandardCharsets; 80import java.util.ArrayList; 81import java.util.List; 82import java.util.Set; 83 84import libcore.io.IoUtils; 85 86public class UserManagerService extends IUserManager.Stub { 87 88 private static final String LOG_TAG = "UserManagerService"; 89 90 private static final boolean DBG = false; 91 92 private static final String TAG_NAME = "name"; 93 private static final String ATTR_FLAGS = "flags"; 94 private static final String ATTR_ICON_PATH = "icon"; 95 private static final String ATTR_ID = "id"; 96 private static final String ATTR_CREATION_TIME = "created"; 97 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 98 private static final String ATTR_SERIAL_NO = "serialNumber"; 99 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 100 private static final String ATTR_PARTIAL = "partial"; 101 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 102 private static final String ATTR_USER_VERSION = "version"; 103 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 104 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 105 private static final String TAG_USERS = "users"; 106 private static final String TAG_USER = "user"; 107 private static final String TAG_RESTRICTIONS = "restrictions"; 108 private static final String TAG_ENTRY = "entry"; 109 private static final String TAG_VALUE = "value"; 110 private static final String ATTR_KEY = "key"; 111 private static final String ATTR_VALUE_TYPE = "type"; 112 private static final String ATTR_MULTIPLE = "m"; 113 114 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 115 private static final String ATTR_TYPE_STRING = "s"; 116 private static final String ATTR_TYPE_BOOLEAN = "b"; 117 private static final String ATTR_TYPE_INTEGER = "i"; 118 private static final String ATTR_TYPE_BUNDLE = "B"; 119 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 120 121 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 122 private static final String USER_LIST_FILENAME = "userlist.xml"; 123 private static final String USER_PHOTO_FILENAME = "photo.png"; 124 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 125 126 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 127 private static final String XML_SUFFIX = ".xml"; 128 129 private static final int MIN_USER_ID = 10; 130 131 private static final int USER_VERSION = 5; 132 133 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 134 135 // Maximum number of managed profiles permitted is 1. This cannot be increased 136 // without first making sure that the rest of the framework is prepared for it. 137 private static final int MAX_MANAGED_PROFILES = 1; 138 139 // Set of user restrictions, which can only be enforced by the system 140 private static final Set<String> SYSTEM_CONTROLLED_RESTRICTIONS = Sets.newArraySet( 141 UserManager.DISALLOW_RECORD_AUDIO); 142 143 static final int WRITE_USER_MSG = 1; 144 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 145 146 private static final String XATTR_SERIAL = "user.serial"; 147 148 private final Context mContext; 149 private final PackageManagerService mPm; 150 private final Object mInstallLock; 151 private final Object mPackagesLock; 152 153 private final Handler mHandler; 154 155 private final File mUsersDir; 156 private final File mUserListFile; 157 158 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 159 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 160 private final Bundle mGuestRestrictions = new Bundle(); 161 162 /** 163 * Set of user IDs being actively removed. Removed IDs linger in this set 164 * for several seconds to work around a VFS caching issue. 165 */ 166 // @GuardedBy("mPackagesLock") 167 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 168 169 private int[] mUserIds; 170 private int mNextSerialNumber; 171 private int mUserVersion = 0; 172 173 private IAppOpsService mAppOpsService; 174 175 private static UserManagerService sInstance; 176 177 public static UserManagerService getInstance() { 178 synchronized (UserManagerService.class) { 179 return sInstance; 180 } 181 } 182 183 /** 184 * Available for testing purposes. 185 */ 186 UserManagerService(File dataDir, File baseUserPath) { 187 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 188 } 189 190 /** 191 * Called by package manager to create the service. This is closely 192 * associated with the package manager, and the given lock is the 193 * package manager's own lock. 194 */ 195 UserManagerService(Context context, PackageManagerService pm, 196 Object installLock, Object packagesLock) { 197 this(context, pm, installLock, packagesLock, 198 Environment.getDataDirectory(), 199 new File(Environment.getDataDirectory(), "user")); 200 } 201 202 /** 203 * Available for testing purposes. 204 */ 205 private UserManagerService(Context context, PackageManagerService pm, 206 Object installLock, Object packagesLock, 207 File dataDir, File baseUserPath) { 208 mContext = context; 209 mPm = pm; 210 mInstallLock = installLock; 211 mPackagesLock = packagesLock; 212 mHandler = new MainHandler(); 213 synchronized (mInstallLock) { 214 synchronized (mPackagesLock) { 215 mUsersDir = new File(dataDir, USER_INFO_DIR); 216 mUsersDir.mkdirs(); 217 // Make zeroth user directory, for services to migrate their files to that location 218 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 219 userZeroDir.mkdirs(); 220 FileUtils.setPermissions(mUsersDir.toString(), 221 FileUtils.S_IRWXU|FileUtils.S_IRWXG 222 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 223 -1, -1); 224 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 225 initDefaultGuestRestrictions(); 226 readUserListLocked(); 227 sInstance = this; 228 } 229 } 230 } 231 232 void systemReady() { 233 synchronized (mInstallLock) { 234 synchronized (mPackagesLock) { 235 // Prune out any partially created/partially removed users. 236 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 237 for (int i = 0; i < mUsers.size(); i++) { 238 UserInfo ui = mUsers.valueAt(i); 239 if ((ui.partial || ui.guestToRemove) && i != 0) { 240 partials.add(ui); 241 } 242 } 243 for (int i = 0; i < partials.size(); i++) { 244 UserInfo ui = partials.get(i); 245 Slog.w(LOG_TAG, "Removing partially created user #" + i 246 + " (name=" + ui.name + ")"); 247 removeUserStateLocked(ui.id); 248 } 249 } 250 } 251 onUserForeground(UserHandle.USER_SYSTEM); 252 mAppOpsService = IAppOpsService.Stub.asInterface( 253 ServiceManager.getService(Context.APP_OPS_SERVICE)); 254 for (int i = 0; i < mUserIds.length; ++i) { 255 try { 256 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 257 } catch (RemoteException e) { 258 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 259 } 260 } 261 } 262 263 @Override 264 public UserInfo getPrimaryUser() { 265 checkManageUsersPermission("query users"); 266 synchronized (mPackagesLock) { 267 for (int i = 0; i < mUsers.size(); i++) { 268 UserInfo ui = mUsers.valueAt(i); 269 if (ui.isPrimary()) { 270 return ui; 271 } 272 } 273 } 274 return null; 275 } 276 277 @Override 278 public List<UserInfo> getUsers(boolean excludeDying) { 279 checkManageUsersPermission("query users"); 280 synchronized (mPackagesLock) { 281 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 282 for (int i = 0; i < mUsers.size(); i++) { 283 UserInfo ui = mUsers.valueAt(i); 284 if (ui.partial) { 285 continue; 286 } 287 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 288 users.add(ui); 289 } 290 } 291 return users; 292 } 293 } 294 295 @Override 296 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 297 if (userId != UserHandle.getCallingUserId()) { 298 checkManageUsersPermission("getting profiles related to user " + userId); 299 } 300 final long ident = Binder.clearCallingIdentity(); 301 try { 302 synchronized (mPackagesLock) { 303 return getProfilesLocked(userId, enabledOnly); 304 } 305 } finally { 306 Binder.restoreCallingIdentity(ident); 307 } 308 } 309 310 /** Assume permissions already checked and caller's identity cleared */ 311 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 312 UserInfo user = getUserInfoLocked(userId); 313 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 314 if (user == null) { 315 // Probably a dying user 316 return users; 317 } 318 for (int i = 0; i < mUsers.size(); i++) { 319 UserInfo profile = mUsers.valueAt(i); 320 if (!isProfileOf(user, profile)) { 321 continue; 322 } 323 if (enabledOnly && !profile.isEnabled()) { 324 continue; 325 } 326 if (mRemovingUserIds.get(profile.id)) { 327 continue; 328 } 329 users.add(profile); 330 } 331 return users; 332 } 333 334 @Override 335 public UserInfo getProfileParent(int userHandle) { 336 checkManageUsersPermission("get the profile parent"); 337 synchronized (mPackagesLock) { 338 return getProfileParentLocked(userHandle); 339 } 340 } 341 342 private UserInfo getProfileParentLocked(int userHandle) { 343 UserInfo profile = getUserInfoLocked(userHandle); 344 if (profile == null) { 345 return null; 346 } 347 int parentUserId = profile.profileGroupId; 348 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 349 return null; 350 } else { 351 return getUserInfoLocked(parentUserId); 352 } 353 } 354 355 private boolean isProfileOf(UserInfo user, UserInfo profile) { 356 return user.id == profile.id || 357 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 358 && user.profileGroupId == profile.profileGroupId); 359 } 360 361 @Override 362 public void setUserEnabled(int userId) { 363 checkManageUsersPermission("enable user"); 364 synchronized (mPackagesLock) { 365 UserInfo info = getUserInfoLocked(userId); 366 if (info != null && !info.isEnabled()) { 367 info.flags ^= UserInfo.FLAG_DISABLED; 368 writeUserLocked(info); 369 } 370 } 371 } 372 373 @Override 374 public UserInfo getUserInfo(int userId) { 375 checkManageUsersPermission("query user"); 376 synchronized (mPackagesLock) { 377 return getUserInfoLocked(userId); 378 } 379 } 380 381 @Override 382 public boolean isRestricted() { 383 synchronized (mPackagesLock) { 384 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 385 } 386 } 387 388 /* 389 * Should be locked on mUsers before calling this. 390 */ 391 private UserInfo getUserInfoLocked(int userId) { 392 UserInfo ui = mUsers.get(userId); 393 // If it is partial and not in the process of being removed, return as unknown user. 394 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 395 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 396 return null; 397 } 398 return ui; 399 } 400 401 public boolean exists(int userId) { 402 synchronized (mPackagesLock) { 403 return ArrayUtils.contains(mUserIds, userId); 404 } 405 } 406 407 @Override 408 public void setUserName(int userId, String name) { 409 checkManageUsersPermission("rename users"); 410 boolean changed = false; 411 synchronized (mPackagesLock) { 412 UserInfo info = mUsers.get(userId); 413 if (info == null || info.partial) { 414 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 415 return; 416 } 417 if (name != null && !name.equals(info.name)) { 418 info.name = name; 419 writeUserLocked(info); 420 changed = true; 421 } 422 } 423 if (changed) { 424 sendUserInfoChangedBroadcast(userId); 425 } 426 } 427 428 @Override 429 public void setUserIcon(int userId, Bitmap bitmap) { 430 checkManageUsersPermission("update users"); 431 long ident = Binder.clearCallingIdentity(); 432 try { 433 synchronized (mPackagesLock) { 434 UserInfo info = mUsers.get(userId); 435 if (info == null || info.partial) { 436 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 437 return; 438 } 439 writeBitmapLocked(info, bitmap); 440 writeUserLocked(info); 441 } 442 sendUserInfoChangedBroadcast(userId); 443 } finally { 444 Binder.restoreCallingIdentity(ident); 445 } 446 } 447 448 private void sendUserInfoChangedBroadcast(int userId) { 449 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 450 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 451 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 452 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 453 } 454 455 @Override 456 public ParcelFileDescriptor getUserIcon(int userId) { 457 String iconPath; 458 synchronized (mPackagesLock) { 459 UserInfo info = mUsers.get(userId); 460 if (info == null || info.partial) { 461 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 462 return null; 463 } 464 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 465 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 466 || callingGroupId != info.profileGroupId) { 467 checkManageUsersPermission("get the icon of a user who is not related"); 468 } 469 if (info.iconPath == null) { 470 return null; 471 } 472 iconPath = info.iconPath; 473 } 474 475 try { 476 return ParcelFileDescriptor.open( 477 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 478 } catch (FileNotFoundException e) { 479 Log.e(LOG_TAG, "Couldn't find icon file", e); 480 } 481 return null; 482 } 483 484 public void makeInitialized(int userId) { 485 checkManageUsersPermission("makeInitialized"); 486 synchronized (mPackagesLock) { 487 UserInfo info = mUsers.get(userId); 488 if (info == null || info.partial) { 489 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 490 } 491 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 492 info.flags |= UserInfo.FLAG_INITIALIZED; 493 scheduleWriteUserLocked(info); 494 } 495 } 496 } 497 498 /** 499 * If default guest restrictions haven't been initialized yet, add the basic 500 * restrictions. 501 */ 502 private void initDefaultGuestRestrictions() { 503 if (mGuestRestrictions.isEmpty()) { 504 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 505 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 506 } 507 } 508 509 @Override 510 public Bundle getDefaultGuestRestrictions() { 511 checkManageUsersPermission("getDefaultGuestRestrictions"); 512 synchronized (mPackagesLock) { 513 return new Bundle(mGuestRestrictions); 514 } 515 } 516 517 @Override 518 public void setDefaultGuestRestrictions(Bundle restrictions) { 519 checkManageUsersPermission("setDefaultGuestRestrictions"); 520 synchronized (mPackagesLock) { 521 mGuestRestrictions.clear(); 522 mGuestRestrictions.putAll(restrictions); 523 writeUserListLocked(); 524 } 525 } 526 527 @Override 528 public boolean hasUserRestriction(String restrictionKey, int userId) { 529 synchronized (mPackagesLock) { 530 Bundle restrictions = mUserRestrictions.get(userId); 531 return restrictions != null && restrictions.getBoolean(restrictionKey); 532 } 533 } 534 535 @Override 536 public Bundle getUserRestrictions(int userId) { 537 // checkManageUsersPermission("getUserRestrictions"); 538 539 synchronized (mPackagesLock) { 540 Bundle restrictions = mUserRestrictions.get(userId); 541 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 542 } 543 } 544 545 @Override 546 public void setUserRestriction(String key, boolean value, int userId) { 547 checkManageUsersPermission("setUserRestriction"); 548 synchronized (mPackagesLock) { 549 if (!SYSTEM_CONTROLLED_RESTRICTIONS.contains(key)) { 550 Bundle restrictions = getUserRestrictions(userId); 551 restrictions.putBoolean(key, value); 552 setUserRestrictionsInternalLocked(restrictions, userId); 553 } 554 } 555 } 556 557 @Override 558 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 559 checkSystemOrRoot("setSystemControlledUserRestriction"); 560 synchronized (mPackagesLock) { 561 Bundle restrictions = getUserRestrictions(userId); 562 restrictions.putBoolean(key, value); 563 setUserRestrictionsInternalLocked(restrictions, userId); 564 } 565 } 566 567 @Override 568 public void setUserRestrictions(Bundle restrictions, int userId) { 569 checkManageUsersPermission("setUserRestrictions"); 570 if (restrictions == null) return; 571 572 synchronized (mPackagesLock) { 573 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 574 // Restore the original state of system controlled restrictions from oldUserRestrictions 575 for (String key : SYSTEM_CONTROLLED_RESTRICTIONS) { 576 restrictions.remove(key); 577 if (oldUserRestrictions.containsKey(key)) { 578 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 579 } 580 } 581 setUserRestrictionsInternalLocked(restrictions, userId); 582 } 583 } 584 585 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 586 final Bundle userRestrictions = mUserRestrictions.get(userId); 587 userRestrictions.clear(); 588 userRestrictions.putAll(restrictions); 589 long token = Binder.clearCallingIdentity(); 590 try { 591 mAppOpsService.setUserRestrictions(userRestrictions, userId); 592 } catch (RemoteException e) { 593 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 594 } finally { 595 Binder.restoreCallingIdentity(token); 596 } 597 scheduleWriteUserLocked(mUsers.get(userId)); 598 } 599 600 /** 601 * Check if we've hit the limit of how many users can be created. 602 */ 603 private boolean isUserLimitReachedLocked() { 604 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 605 } 606 607 @Override 608 public boolean canAddMoreManagedProfiles() { 609 checkManageUsersPermission("check if more managed profiles can be added."); 610 if (ActivityManager.isLowRamDeviceStatic()) { 611 return false; 612 } 613 if (!mContext.getPackageManager().hasSystemFeature( 614 PackageManager.FEATURE_MANAGED_USERS)) { 615 return false; 616 } 617 synchronized(mPackagesLock) { 618 // Limit number of managed profiles that can be created 619 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 620 >= MAX_MANAGED_PROFILES) { 621 return false; 622 } 623 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 624 // We allow creating a managed profile in the special case where there is only one user. 625 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 626 } 627 } 628 629 private int getAliveUsersExcludingGuestsCountLocked() { 630 int aliveUserCount = 0; 631 final int totalUserCount = mUsers.size(); 632 // Skip over users being removed 633 for (int i = 0; i < totalUserCount; i++) { 634 UserInfo user = mUsers.valueAt(i); 635 if (!mRemovingUserIds.get(user.id) 636 && !user.isGuest() && !user.partial) { 637 aliveUserCount++; 638 } 639 } 640 return aliveUserCount; 641 } 642 643 /** 644 * Enforces that only the system UID or root's UID or apps that have the 645 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 646 * permission can make certain calls to the UserManager. 647 * 648 * @param message used as message if SecurityException is thrown 649 * @throws SecurityException if the caller is not system or root 650 */ 651 private static final void checkManageUsersPermission(String message) { 652 final int uid = Binder.getCallingUid(); 653 if (uid != Process.SYSTEM_UID && uid != 0 654 && ActivityManager.checkComponentPermission( 655 android.Manifest.permission.MANAGE_USERS, 656 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 657 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 658 } 659 } 660 661 private static void checkSystemOrRoot(String message) { 662 final int uid = Binder.getCallingUid(); 663 if (uid != Process.SYSTEM_UID && uid != 0) { 664 throw new SecurityException("Only system may call: " + message); 665 } 666 } 667 668 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 669 try { 670 File dir = new File(mUsersDir, Integer.toString(info.id)); 671 File file = new File(dir, USER_PHOTO_FILENAME); 672 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 673 if (!dir.exists()) { 674 dir.mkdir(); 675 FileUtils.setPermissions( 676 dir.getPath(), 677 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 678 -1, -1); 679 } 680 FileOutputStream os; 681 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 682 && tmp.renameTo(file)) { 683 info.iconPath = file.getAbsolutePath(); 684 } 685 try { 686 os.close(); 687 } catch (IOException ioe) { 688 // What the ... ! 689 } 690 tmp.delete(); 691 } catch (FileNotFoundException e) { 692 Slog.w(LOG_TAG, "Error setting photo for user ", e); 693 } 694 } 695 696 /** 697 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 698 * cache it elsewhere. 699 * @return the array of user ids. 700 */ 701 public int[] getUserIds() { 702 synchronized (mPackagesLock) { 703 return mUserIds; 704 } 705 } 706 707 int[] getUserIdsLPr() { 708 return mUserIds; 709 } 710 711 private void readUserListLocked() { 712 if (!mUserListFile.exists()) { 713 fallbackToSingleUserLocked(); 714 return; 715 } 716 FileInputStream fis = null; 717 AtomicFile userListFile = new AtomicFile(mUserListFile); 718 try { 719 fis = userListFile.openRead(); 720 XmlPullParser parser = Xml.newPullParser(); 721 parser.setInput(fis, StandardCharsets.UTF_8.name()); 722 int type; 723 while ((type = parser.next()) != XmlPullParser.START_TAG 724 && type != XmlPullParser.END_DOCUMENT) { 725 ; 726 } 727 728 if (type != XmlPullParser.START_TAG) { 729 Slog.e(LOG_TAG, "Unable to read user list"); 730 fallbackToSingleUserLocked(); 731 return; 732 } 733 734 mNextSerialNumber = -1; 735 if (parser.getName().equals(TAG_USERS)) { 736 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 737 if (lastSerialNumber != null) { 738 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 739 } 740 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 741 if (versionNumber != null) { 742 mUserVersion = Integer.parseInt(versionNumber); 743 } 744 } 745 746 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 747 if (type == XmlPullParser.START_TAG) { 748 final String name = parser.getName(); 749 if (name.equals(TAG_USER)) { 750 String id = parser.getAttributeValue(null, ATTR_ID); 751 UserInfo user = readUserLocked(Integer.parseInt(id)); 752 753 if (user != null) { 754 mUsers.put(user.id, user); 755 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 756 mNextSerialNumber = user.id + 1; 757 } 758 } 759 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 760 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 761 && type != XmlPullParser.END_TAG) { 762 if (type == XmlPullParser.START_TAG) { 763 if (parser.getName().equals(TAG_RESTRICTIONS)) { 764 readRestrictionsLocked(parser, mGuestRestrictions); 765 } 766 break; 767 } 768 } 769 } 770 } 771 } 772 updateUserIdsLocked(); 773 upgradeIfNecessaryLocked(); 774 } catch (IOException ioe) { 775 fallbackToSingleUserLocked(); 776 } catch (XmlPullParserException pe) { 777 fallbackToSingleUserLocked(); 778 } finally { 779 if (fis != null) { 780 try { 781 fis.close(); 782 } catch (IOException e) { 783 } 784 } 785 } 786 } 787 788 /** 789 * Upgrade steps between versions, either for fixing bugs or changing the data format. 790 */ 791 private void upgradeIfNecessaryLocked() { 792 int userVersion = mUserVersion; 793 if (userVersion < 1) { 794 // Assign a proper name for the owner, if not initialized correctly before 795 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 796 if ("Primary".equals(user.name)) { 797 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 798 scheduleWriteUserLocked(user); 799 } 800 userVersion = 1; 801 } 802 803 if (userVersion < 2) { 804 // Owner should be marked as initialized 805 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 806 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 807 user.flags |= UserInfo.FLAG_INITIALIZED; 808 scheduleWriteUserLocked(user); 809 } 810 userVersion = 2; 811 } 812 813 814 if (userVersion < 4) { 815 userVersion = 4; 816 } 817 818 if (userVersion < 5) { 819 initDefaultGuestRestrictions(); 820 userVersion = 5; 821 } 822 823 if (userVersion < USER_VERSION) { 824 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 825 + USER_VERSION); 826 } else { 827 mUserVersion = userVersion; 828 writeUserListLocked(); 829 } 830 } 831 832 private void fallbackToSingleUserLocked() { 833 int flags = UserInfo.FLAG_INITIALIZED; 834 // In split system user mode, the admin and primary flags are assigned to the first human 835 // user. 836 if (!UserManager.isSplitSystemUser()) { 837 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 838 } 839 // Create the system user 840 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 841 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 842 flags); 843 mUsers.put(system.id, system); 844 mNextSerialNumber = MIN_USER_ID; 845 mUserVersion = USER_VERSION; 846 847 Bundle restrictions = new Bundle(); 848 mUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 849 850 updateUserIdsLocked(); 851 initDefaultGuestRestrictions(); 852 853 writeUserListLocked(); 854 writeUserLocked(system); 855 } 856 857 private void scheduleWriteUserLocked(UserInfo userInfo) { 858 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 859 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 860 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 861 } 862 } 863 864 /* 865 * Writes the user file in this format: 866 * 867 * <user flags="20039023" id="0"> 868 * <name>Primary</name> 869 * </user> 870 */ 871 private void writeUserLocked(UserInfo userInfo) { 872 FileOutputStream fos = null; 873 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 874 try { 875 fos = userFile.startWrite(); 876 final BufferedOutputStream bos = new BufferedOutputStream(fos); 877 878 // XmlSerializer serializer = XmlUtils.serializerInstance(); 879 final XmlSerializer serializer = new FastXmlSerializer(); 880 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 881 serializer.startDocument(null, true); 882 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 883 884 serializer.startTag(null, TAG_USER); 885 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 886 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 887 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 888 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 889 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 890 Long.toString(userInfo.lastLoggedInTime)); 891 if (userInfo.iconPath != null) { 892 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 893 } 894 if (userInfo.partial) { 895 serializer.attribute(null, ATTR_PARTIAL, "true"); 896 } 897 if (userInfo.guestToRemove) { 898 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 899 } 900 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 901 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 902 Integer.toString(userInfo.profileGroupId)); 903 } 904 905 serializer.startTag(null, TAG_NAME); 906 serializer.text(userInfo.name); 907 serializer.endTag(null, TAG_NAME); 908 Bundle restrictions = mUserRestrictions.get(userInfo.id); 909 if (restrictions != null) { 910 writeRestrictionsLocked(serializer, restrictions); 911 } 912 serializer.endTag(null, TAG_USER); 913 914 serializer.endDocument(); 915 userFile.finishWrite(fos); 916 } catch (Exception ioe) { 917 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 918 userFile.failWrite(fos); 919 } 920 } 921 922 /* 923 * Writes the user list file in this format: 924 * 925 * <users nextSerialNumber="3"> 926 * <user id="0"></user> 927 * <user id="2"></user> 928 * </users> 929 */ 930 private void writeUserListLocked() { 931 FileOutputStream fos = null; 932 AtomicFile userListFile = new AtomicFile(mUserListFile); 933 try { 934 fos = userListFile.startWrite(); 935 final BufferedOutputStream bos = new BufferedOutputStream(fos); 936 937 // XmlSerializer serializer = XmlUtils.serializerInstance(); 938 final XmlSerializer serializer = new FastXmlSerializer(); 939 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 940 serializer.startDocument(null, true); 941 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 942 943 serializer.startTag(null, TAG_USERS); 944 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 945 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 946 947 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 948 writeRestrictionsLocked(serializer, mGuestRestrictions); 949 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 950 for (int i = 0; i < mUsers.size(); i++) { 951 UserInfo user = mUsers.valueAt(i); 952 serializer.startTag(null, TAG_USER); 953 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 954 serializer.endTag(null, TAG_USER); 955 } 956 957 serializer.endTag(null, TAG_USERS); 958 959 serializer.endDocument(); 960 userListFile.finishWrite(fos); 961 } catch (Exception e) { 962 userListFile.failWrite(fos); 963 Slog.e(LOG_TAG, "Error writing user list"); 964 } 965 } 966 967 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 968 throws IOException { 969 serializer.startTag(null, TAG_RESTRICTIONS); 970 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 971 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 972 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 973 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 974 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 975 writeBoolean(serializer, restrictions, 976 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 977 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 978 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 979 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 980 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 981 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 982 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 983 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 984 writeBoolean(serializer, restrictions, UserManager.DISALLOW_NETWORK_RESET); 985 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 986 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 987 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 988 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 989 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 990 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 991 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 992 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 993 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 994 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 995 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 996 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FUN); 997 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 998 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 999 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1000 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 1001 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1002 writeBoolean(serializer, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 1003 serializer.endTag(null, TAG_RESTRICTIONS); 1004 } 1005 1006 private UserInfo readUserLocked(int id) { 1007 int flags = 0; 1008 int serialNumber = id; 1009 String name = null; 1010 String iconPath = null; 1011 long creationTime = 0L; 1012 long lastLoggedInTime = 0L; 1013 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1014 boolean partial = false; 1015 boolean guestToRemove = false; 1016 Bundle restrictions = new Bundle(); 1017 1018 FileInputStream fis = null; 1019 try { 1020 AtomicFile userFile = 1021 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1022 fis = userFile.openRead(); 1023 XmlPullParser parser = Xml.newPullParser(); 1024 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1025 int type; 1026 while ((type = parser.next()) != XmlPullParser.START_TAG 1027 && type != XmlPullParser.END_DOCUMENT) { 1028 ; 1029 } 1030 1031 if (type != XmlPullParser.START_TAG) { 1032 Slog.e(LOG_TAG, "Unable to read user " + id); 1033 return null; 1034 } 1035 1036 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1037 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1038 if (storedId != id) { 1039 Slog.e(LOG_TAG, "User id does not match the file name"); 1040 return null; 1041 } 1042 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1043 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1044 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1045 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1046 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1047 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1048 UserInfo.NO_PROFILE_GROUP_ID); 1049 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1050 if ("true".equals(valueString)) { 1051 partial = true; 1052 } 1053 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1054 if ("true".equals(valueString)) { 1055 guestToRemove = true; 1056 } 1057 1058 int outerDepth = parser.getDepth(); 1059 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1060 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1061 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1062 continue; 1063 } 1064 String tag = parser.getName(); 1065 if (TAG_NAME.equals(tag)) { 1066 type = parser.next(); 1067 if (type == XmlPullParser.TEXT) { 1068 name = parser.getText(); 1069 } 1070 } else if (TAG_RESTRICTIONS.equals(tag)) { 1071 readRestrictionsLocked(parser, restrictions); 1072 } 1073 } 1074 } 1075 1076 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1077 userInfo.serialNumber = serialNumber; 1078 userInfo.creationTime = creationTime; 1079 userInfo.lastLoggedInTime = lastLoggedInTime; 1080 userInfo.partial = partial; 1081 userInfo.guestToRemove = guestToRemove; 1082 userInfo.profileGroupId = profileGroupId; 1083 mUserRestrictions.append(id, restrictions); 1084 return userInfo; 1085 1086 } catch (IOException ioe) { 1087 } catch (XmlPullParserException pe) { 1088 } finally { 1089 if (fis != null) { 1090 try { 1091 fis.close(); 1092 } catch (IOException e) { 1093 } 1094 } 1095 } 1096 return null; 1097 } 1098 1099 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1100 throws IOException { 1101 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1102 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1103 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1104 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1105 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1106 readBoolean(parser, restrictions, 1107 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1108 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1109 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1110 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1111 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1112 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1113 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1114 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1115 readBoolean(parser, restrictions, UserManager.DISALLOW_NETWORK_RESET); 1116 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1117 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1118 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1119 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1120 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1121 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1122 readBoolean(parser, restrictions, 1123 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1124 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1125 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1126 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1127 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1128 readBoolean(parser, restrictions, UserManager.DISALLOW_FUN); 1129 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1130 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1131 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1132 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1133 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1134 readBoolean(parser, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 1135 } 1136 1137 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1138 String restrictionKey) { 1139 String value = parser.getAttributeValue(null, restrictionKey); 1140 if (value != null) { 1141 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1142 } 1143 } 1144 1145 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1146 throws IOException { 1147 if (restrictions.containsKey(restrictionKey)) { 1148 xml.attribute(null, restrictionKey, 1149 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1150 } 1151 } 1152 1153 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1154 String valueString = parser.getAttributeValue(null, attr); 1155 if (valueString == null) return defaultValue; 1156 try { 1157 return Integer.parseInt(valueString); 1158 } catch (NumberFormatException nfe) { 1159 return defaultValue; 1160 } 1161 } 1162 1163 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1164 String valueString = parser.getAttributeValue(null, attr); 1165 if (valueString == null) return defaultValue; 1166 try { 1167 return Long.parseLong(valueString); 1168 } catch (NumberFormatException nfe) { 1169 return defaultValue; 1170 } 1171 } 1172 1173 private boolean isPackageInstalled(String pkg, int userId) { 1174 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1175 PackageManager.GET_UNINSTALLED_PACKAGES, 1176 userId); 1177 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1178 return false; 1179 } 1180 return true; 1181 } 1182 1183 /** 1184 * Removes all the restrictions files (res_<packagename>) for a given user. 1185 * Does not do any permissions checking. 1186 */ 1187 private void cleanAppRestrictions(int userId) { 1188 synchronized (mPackagesLock) { 1189 File dir = Environment.getUserSystemDirectory(userId); 1190 String[] files = dir.list(); 1191 if (files == null) return; 1192 for (String fileName : files) { 1193 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1194 File resFile = new File(dir, fileName); 1195 if (resFile.exists()) { 1196 resFile.delete(); 1197 } 1198 } 1199 } 1200 } 1201 } 1202 1203 /** 1204 * Removes the app restrictions file for a specific package and user id, if it exists. 1205 */ 1206 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1207 synchronized (mPackagesLock) { 1208 File dir = Environment.getUserSystemDirectory(userId); 1209 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1210 if (resFile.exists()) { 1211 resFile.delete(); 1212 } 1213 } 1214 } 1215 1216 @Override 1217 public UserInfo createProfileForUser(String name, int flags, int userId) { 1218 checkManageUsersPermission("Only the system can create users"); 1219 if (userId != UserHandle.USER_OWNER) { 1220 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1221 return null; 1222 } 1223 return createUserInternal(name, flags, userId); 1224 } 1225 1226 @Override 1227 public UserInfo createUser(String name, int flags) { 1228 checkManageUsersPermission("Only the system can create users"); 1229 return createUserInternal(name, flags, UserHandle.USER_NULL); 1230 } 1231 1232 private UserInfo createUserInternal(String name, int flags, int parentId) { 1233 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1234 UserManager.DISALLOW_ADD_USER, false)) { 1235 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1236 return null; 1237 } 1238 if (ActivityManager.isLowRamDeviceStatic()) { 1239 return null; 1240 } 1241 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1242 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1243 final long ident = Binder.clearCallingIdentity(); 1244 UserInfo userInfo = null; 1245 final int userId; 1246 try { 1247 synchronized (mInstallLock) { 1248 synchronized (mPackagesLock) { 1249 UserInfo parent = null; 1250 if (parentId != UserHandle.USER_NULL) { 1251 parent = getUserInfoLocked(parentId); 1252 if (parent == null) return null; 1253 } 1254 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1255 return null; 1256 } 1257 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1258 // If we're not adding a guest user or a managed profile and the limit has 1259 // been reached, cannot add a user. 1260 return null; 1261 } 1262 // If we're adding a guest and there already exists one, bail. 1263 if (isGuest && findCurrentGuestUserLocked() != null) { 1264 return null; 1265 } 1266 // In split system user mode, we assign the first human user the primary flag. 1267 // And if there is no device owner, we also assign the admin flag to primary 1268 // user. 1269 if (UserManager.isSplitSystemUser() 1270 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1271 flags |= UserInfo.FLAG_PRIMARY; 1272 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1273 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1274 if (devicePolicyManager == null 1275 || devicePolicyManager.getDeviceOwner() == null) { 1276 flags |= UserInfo.FLAG_ADMIN; 1277 } 1278 } 1279 userId = getNextAvailableIdLocked(); 1280 userInfo = new UserInfo(userId, name, null, flags); 1281 userInfo.serialNumber = mNextSerialNumber++; 1282 long now = System.currentTimeMillis(); 1283 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1284 userInfo.partial = true; 1285 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1286 mUsers.put(userId, userInfo); 1287 writeUserListLocked(); 1288 if (parent != null) { 1289 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1290 parent.profileGroupId = parent.id; 1291 scheduleWriteUserLocked(parent); 1292 } 1293 userInfo.profileGroupId = parent.profileGroupId; 1294 } 1295 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1296 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1297 final String volumeUuid = vol.getFsUuid(); 1298 try { 1299 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1300 userId); 1301 prepareUserDirectory(mContext, volumeUuid, userId); 1302 enforceSerialNumber(userDir, userInfo.serialNumber); 1303 } catch (IOException e) { 1304 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1305 } 1306 } 1307 mPm.createNewUserLILPw(userId); 1308 userInfo.partial = false; 1309 scheduleWriteUserLocked(userInfo); 1310 updateUserIdsLocked(); 1311 Bundle restrictions = new Bundle(); 1312 mUserRestrictions.append(userId, restrictions); 1313 } 1314 } 1315 mPm.newUserCreated(userId); 1316 if (userInfo != null) { 1317 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1318 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1319 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1320 android.Manifest.permission.MANAGE_USERS); 1321 } 1322 } finally { 1323 Binder.restoreCallingIdentity(ident); 1324 } 1325 return userInfo; 1326 } 1327 1328 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1329 int count = 0; 1330 for (int i = mUsers.size() - 1; i >= 0; i--) { 1331 UserInfo user = mUsers.valueAt(i); 1332 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1333 if ((user.flags & flags) != 0) { 1334 count++; 1335 } 1336 } 1337 } 1338 return count; 1339 } 1340 1341 /** 1342 * Find the current guest user. If the Guest user is partial, 1343 * then do not include it in the results as it is about to die. 1344 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1345 * the special handling of Guests being removed. 1346 */ 1347 private UserInfo findCurrentGuestUserLocked() { 1348 final int size = mUsers.size(); 1349 for (int i = 0; i < size; i++) { 1350 final UserInfo user = mUsers.valueAt(i); 1351 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1352 return user; 1353 } 1354 } 1355 return null; 1356 } 1357 1358 /** 1359 * Mark this guest user for deletion to allow us to create another guest 1360 * and switch to that user before actually removing this guest. 1361 * @param userHandle the userid of the current guest 1362 * @return whether the user could be marked for deletion 1363 */ 1364 public boolean markGuestForDeletion(int userHandle) { 1365 checkManageUsersPermission("Only the system can remove users"); 1366 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1367 UserManager.DISALLOW_REMOVE_USER, false)) { 1368 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1369 return false; 1370 } 1371 1372 long ident = Binder.clearCallingIdentity(); 1373 try { 1374 final UserInfo user; 1375 synchronized (mPackagesLock) { 1376 user = mUsers.get(userHandle); 1377 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1378 return false; 1379 } 1380 if (!user.isGuest()) { 1381 return false; 1382 } 1383 // We set this to a guest user that is to be removed. This is a temporary state 1384 // where we are allowed to add new Guest users, even if this one is still not 1385 // removed. This user will still show up in getUserInfo() calls. 1386 // If we don't get around to removing this Guest user, it will be purged on next 1387 // startup. 1388 user.guestToRemove = true; 1389 // Mark it as disabled, so that it isn't returned any more when 1390 // profiles are queried. 1391 user.flags |= UserInfo.FLAG_DISABLED; 1392 writeUserLocked(user); 1393 } 1394 } finally { 1395 Binder.restoreCallingIdentity(ident); 1396 } 1397 return true; 1398 } 1399 1400 /** 1401 * Removes a user and all data directories created for that user. This method should be called 1402 * after the user's processes have been terminated. 1403 * @param userHandle the user's id 1404 */ 1405 public boolean removeUser(int userHandle) { 1406 checkManageUsersPermission("Only the system can remove users"); 1407 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1408 UserManager.DISALLOW_REMOVE_USER, false)) { 1409 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1410 return false; 1411 } 1412 1413 long ident = Binder.clearCallingIdentity(); 1414 try { 1415 final UserInfo user; 1416 synchronized (mPackagesLock) { 1417 user = mUsers.get(userHandle); 1418 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1419 return false; 1420 } 1421 1422 // We remember deleted user IDs to prevent them from being 1423 // reused during the current boot; they can still be reused 1424 // after a reboot. 1425 mRemovingUserIds.put(userHandle, true); 1426 1427 try { 1428 mAppOpsService.removeUser(userHandle); 1429 } catch (RemoteException e) { 1430 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1431 } 1432 // Set this to a partially created user, so that the user will be purged 1433 // on next startup, in case the runtime stops now before stopping and 1434 // removing the user completely. 1435 user.partial = true; 1436 // Mark it as disabled, so that it isn't returned any more when 1437 // profiles are queried. 1438 user.flags |= UserInfo.FLAG_DISABLED; 1439 writeUserLocked(user); 1440 } 1441 1442 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1443 && user.isManagedProfile()) { 1444 // Send broadcast to notify system that the user removed was a 1445 // managed user. 1446 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1447 } 1448 1449 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1450 int res; 1451 try { 1452 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1453 new IStopUserCallback.Stub() { 1454 @Override 1455 public void userStopped(int userId) { 1456 finishRemoveUser(userId); 1457 } 1458 @Override 1459 public void userStopAborted(int userId) { 1460 } 1461 }); 1462 } catch (RemoteException e) { 1463 return false; 1464 } 1465 return res == ActivityManager.USER_OP_SUCCESS; 1466 } finally { 1467 Binder.restoreCallingIdentity(ident); 1468 } 1469 } 1470 1471 void finishRemoveUser(final int userHandle) { 1472 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1473 // Let other services shutdown any activity and clean up their state before completely 1474 // wiping the user's system directory and removing from the user list 1475 long ident = Binder.clearCallingIdentity(); 1476 try { 1477 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1478 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1479 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1480 android.Manifest.permission.MANAGE_USERS, 1481 1482 new BroadcastReceiver() { 1483 @Override 1484 public void onReceive(Context context, Intent intent) { 1485 if (DBG) { 1486 Slog.i(LOG_TAG, 1487 "USER_REMOVED broadcast sent, cleaning up user data " 1488 + userHandle); 1489 } 1490 new Thread() { 1491 public void run() { 1492 synchronized (mInstallLock) { 1493 synchronized (mPackagesLock) { 1494 removeUserStateLocked(userHandle); 1495 } 1496 } 1497 } 1498 }.start(); 1499 } 1500 }, 1501 1502 null, Activity.RESULT_OK, null, null); 1503 } finally { 1504 Binder.restoreCallingIdentity(ident); 1505 } 1506 } 1507 1508 private void removeUserStateLocked(final int userHandle) { 1509 mContext.getSystemService(StorageManager.class) 1510 .deleteUserKey(userHandle); 1511 // Cleanup package manager settings 1512 mPm.cleanUpUserLILPw(this, userHandle); 1513 1514 // Remove this user from the list 1515 mUsers.remove(userHandle); 1516 // Remove user file 1517 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1518 userFile.delete(); 1519 // Update the user list 1520 writeUserListLocked(); 1521 updateUserIdsLocked(); 1522 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1523 } 1524 1525 private void removeDirectoryRecursive(File parent) { 1526 if (parent.isDirectory()) { 1527 String[] files = parent.list(); 1528 for (String filename : files) { 1529 File child = new File(parent, filename); 1530 removeDirectoryRecursive(child); 1531 } 1532 } 1533 parent.delete(); 1534 } 1535 1536 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1537 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1538 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1539 Intent.FLAG_RECEIVER_FOREGROUND); 1540 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1541 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1542 } 1543 1544 @Override 1545 public Bundle getApplicationRestrictions(String packageName) { 1546 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1547 } 1548 1549 @Override 1550 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1551 if (UserHandle.getCallingUserId() != userId 1552 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1553 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1554 } 1555 synchronized (mPackagesLock) { 1556 // Read the restrictions from XML 1557 return readApplicationRestrictionsLocked(packageName, userId); 1558 } 1559 } 1560 1561 @Override 1562 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1563 int userId) { 1564 if (UserHandle.getCallingUserId() != userId 1565 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1566 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1567 } 1568 synchronized (mPackagesLock) { 1569 if (restrictions == null || restrictions.isEmpty()) { 1570 cleanAppRestrictionsForPackage(packageName, userId); 1571 } else { 1572 // Write the restrictions to XML 1573 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1574 } 1575 } 1576 1577 if (isPackageInstalled(packageName, userId)) { 1578 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1579 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1580 changeIntent.setPackage(packageName); 1581 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1582 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1583 } 1584 } 1585 1586 @Override 1587 public void removeRestrictions() { 1588 checkManageUsersPermission("Only system can remove restrictions"); 1589 final int userHandle = UserHandle.getCallingUserId(); 1590 removeRestrictionsForUser(userHandle, true); 1591 } 1592 1593 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1594 synchronized (mPackagesLock) { 1595 // Remove all user restrictions 1596 setUserRestrictions(new Bundle(), userHandle); 1597 // Remove any app restrictions 1598 cleanAppRestrictions(userHandle); 1599 } 1600 if (unhideApps) { 1601 unhideAllInstalledAppsForUser(userHandle); 1602 } 1603 } 1604 1605 private void unhideAllInstalledAppsForUser(final int userHandle) { 1606 mHandler.post(new Runnable() { 1607 @Override 1608 public void run() { 1609 List<ApplicationInfo> apps = 1610 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1611 userHandle).getList(); 1612 final long ident = Binder.clearCallingIdentity(); 1613 try { 1614 for (ApplicationInfo appInfo : apps) { 1615 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1616 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1617 != 0) { 1618 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1619 userHandle); 1620 } 1621 } 1622 } finally { 1623 Binder.restoreCallingIdentity(ident); 1624 } 1625 } 1626 }); 1627 } 1628 private int getUidForPackage(String packageName) { 1629 long ident = Binder.clearCallingIdentity(); 1630 try { 1631 return mContext.getPackageManager().getApplicationInfo(packageName, 1632 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1633 } catch (NameNotFoundException nnfe) { 1634 return -1; 1635 } finally { 1636 Binder.restoreCallingIdentity(ident); 1637 } 1638 } 1639 1640 private Bundle readApplicationRestrictionsLocked(String packageName, 1641 int userId) { 1642 AtomicFile restrictionsFile = 1643 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1644 packageToRestrictionsFileName(packageName))); 1645 return readApplicationRestrictionsLocked(restrictionsFile); 1646 } 1647 1648 @VisibleForTesting 1649 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1650 final Bundle restrictions = new Bundle(); 1651 final ArrayList<String> values = new ArrayList<>(); 1652 if (!restrictionsFile.getBaseFile().exists()) { 1653 return restrictions; 1654 } 1655 1656 FileInputStream fis = null; 1657 try { 1658 fis = restrictionsFile.openRead(); 1659 XmlPullParser parser = Xml.newPullParser(); 1660 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1661 XmlUtils.nextElement(parser); 1662 if (parser.getEventType() != XmlPullParser.START_TAG) { 1663 Slog.e(LOG_TAG, "Unable to read restrictions file " 1664 + restrictionsFile.getBaseFile()); 1665 return restrictions; 1666 } 1667 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1668 readEntry(restrictions, values, parser); 1669 } 1670 } catch (IOException|XmlPullParserException e) { 1671 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1672 } finally { 1673 IoUtils.closeQuietly(fis); 1674 } 1675 return restrictions; 1676 } 1677 1678 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1679 XmlPullParser parser) throws XmlPullParserException, IOException { 1680 int type = parser.getEventType(); 1681 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1682 String key = parser.getAttributeValue(null, ATTR_KEY); 1683 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1684 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1685 if (multiple != null) { 1686 values.clear(); 1687 int count = Integer.parseInt(multiple); 1688 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1689 if (type == XmlPullParser.START_TAG 1690 && parser.getName().equals(TAG_VALUE)) { 1691 values.add(parser.nextText().trim()); 1692 count--; 1693 } 1694 } 1695 String [] valueStrings = new String[values.size()]; 1696 values.toArray(valueStrings); 1697 restrictions.putStringArray(key, valueStrings); 1698 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1699 restrictions.putBundle(key, readBundleEntry(parser, values)); 1700 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1701 final int outerDepth = parser.getDepth(); 1702 ArrayList<Bundle> bundleList = new ArrayList<>(); 1703 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1704 Bundle childBundle = readBundleEntry(parser, values); 1705 bundleList.add(childBundle); 1706 } 1707 restrictions.putParcelableArray(key, 1708 bundleList.toArray(new Bundle[bundleList.size()])); 1709 } else { 1710 String value = parser.nextText().trim(); 1711 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1712 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1713 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1714 restrictions.putInt(key, Integer.parseInt(value)); 1715 } else { 1716 restrictions.putString(key, value); 1717 } 1718 } 1719 } 1720 } 1721 1722 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1723 throws IOException, XmlPullParserException { 1724 Bundle childBundle = new Bundle(); 1725 final int outerDepth = parser.getDepth(); 1726 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1727 readEntry(childBundle, values, parser); 1728 } 1729 return childBundle; 1730 } 1731 1732 private void writeApplicationRestrictionsLocked(String packageName, 1733 Bundle restrictions, int userId) { 1734 AtomicFile restrictionsFile = new AtomicFile( 1735 new File(Environment.getUserSystemDirectory(userId), 1736 packageToRestrictionsFileName(packageName))); 1737 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1738 } 1739 1740 @VisibleForTesting 1741 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1742 AtomicFile restrictionsFile) { 1743 FileOutputStream fos = null; 1744 try { 1745 fos = restrictionsFile.startWrite(); 1746 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1747 1748 final XmlSerializer serializer = new FastXmlSerializer(); 1749 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1750 serializer.startDocument(null, true); 1751 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1752 1753 serializer.startTag(null, TAG_RESTRICTIONS); 1754 writeBundle(restrictions, serializer); 1755 serializer.endTag(null, TAG_RESTRICTIONS); 1756 1757 serializer.endDocument(); 1758 restrictionsFile.finishWrite(fos); 1759 } catch (Exception e) { 1760 restrictionsFile.failWrite(fos); 1761 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1762 } 1763 } 1764 1765 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1766 throws IOException { 1767 for (String key : restrictions.keySet()) { 1768 Object value = restrictions.get(key); 1769 serializer.startTag(null, TAG_ENTRY); 1770 serializer.attribute(null, ATTR_KEY, key); 1771 1772 if (value instanceof Boolean) { 1773 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1774 serializer.text(value.toString()); 1775 } else if (value instanceof Integer) { 1776 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1777 serializer.text(value.toString()); 1778 } else if (value == null || value instanceof String) { 1779 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1780 serializer.text(value != null ? (String) value : ""); 1781 } else if (value instanceof Bundle) { 1782 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1783 writeBundle((Bundle) value, serializer); 1784 } else if (value instanceof Parcelable[]) { 1785 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1786 Parcelable[] array = (Parcelable[]) value; 1787 for (Parcelable parcelable : array) { 1788 if (!(parcelable instanceof Bundle)) { 1789 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1790 } 1791 serializer.startTag(null, TAG_ENTRY); 1792 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1793 writeBundle((Bundle) parcelable, serializer); 1794 serializer.endTag(null, TAG_ENTRY); 1795 } 1796 } else { 1797 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1798 String[] values = (String[]) value; 1799 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1800 for (String choice : values) { 1801 serializer.startTag(null, TAG_VALUE); 1802 serializer.text(choice != null ? choice : ""); 1803 serializer.endTag(null, TAG_VALUE); 1804 } 1805 } 1806 serializer.endTag(null, TAG_ENTRY); 1807 } 1808 } 1809 1810 @Override 1811 public int getUserSerialNumber(int userHandle) { 1812 synchronized (mPackagesLock) { 1813 if (!exists(userHandle)) return -1; 1814 return getUserInfoLocked(userHandle).serialNumber; 1815 } 1816 } 1817 1818 @Override 1819 public int getUserHandle(int userSerialNumber) { 1820 synchronized (mPackagesLock) { 1821 for (int userId : mUserIds) { 1822 UserInfo info = getUserInfoLocked(userId); 1823 if (info != null && info.serialNumber == userSerialNumber) return userId; 1824 } 1825 // Not found 1826 return -1; 1827 } 1828 } 1829 1830 @Override 1831 public long getUserCreationTime(int userHandle) { 1832 int callingUserId = UserHandle.getCallingUserId(); 1833 UserInfo userInfo = null; 1834 synchronized (mPackagesLock) { 1835 if (callingUserId == userHandle) { 1836 userInfo = getUserInfoLocked(userHandle); 1837 } else { 1838 UserInfo parent = getProfileParentLocked(userHandle); 1839 if (parent != null && parent.id == callingUserId) { 1840 userInfo = getUserInfoLocked(userHandle); 1841 } 1842 } 1843 } 1844 if (userInfo == null) { 1845 throw new SecurityException("userHandle can only be the calling user or a managed " 1846 + "profile associated with this user"); 1847 } 1848 return userInfo.creationTime; 1849 } 1850 1851 /** 1852 * Caches the list of user ids in an array, adjusting the array size when necessary. 1853 */ 1854 private void updateUserIdsLocked() { 1855 int num = 0; 1856 for (int i = 0; i < mUsers.size(); i++) { 1857 if (!mUsers.valueAt(i).partial) { 1858 num++; 1859 } 1860 } 1861 final int[] newUsers = new int[num]; 1862 int n = 0; 1863 for (int i = 0; i < mUsers.size(); i++) { 1864 if (!mUsers.valueAt(i).partial) { 1865 newUsers[n++] = mUsers.keyAt(i); 1866 } 1867 } 1868 mUserIds = newUsers; 1869 } 1870 1871 /** 1872 * Make a note of the last started time of a user and do some cleanup. 1873 * @param userId the user that was just foregrounded 1874 */ 1875 public void onUserForeground(int userId) { 1876 synchronized (mPackagesLock) { 1877 UserInfo user = mUsers.get(userId); 1878 long now = System.currentTimeMillis(); 1879 if (user == null || user.partial) { 1880 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1881 return; 1882 } 1883 if (now > EPOCH_PLUS_30_YEARS) { 1884 user.lastLoggedInTime = now; 1885 scheduleWriteUserLocked(user); 1886 } 1887 } 1888 } 1889 1890 /** 1891 * Returns the next available user id, filling in any holes in the ids. 1892 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1893 * for data and battery stats collection, or unexpected cross-talk. 1894 * @return 1895 */ 1896 private int getNextAvailableIdLocked() { 1897 synchronized (mPackagesLock) { 1898 int i = MIN_USER_ID; 1899 while (i < Integer.MAX_VALUE) { 1900 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1901 break; 1902 } 1903 i++; 1904 } 1905 return i; 1906 } 1907 } 1908 1909 private String packageToRestrictionsFileName(String packageName) { 1910 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1911 } 1912 1913 /** 1914 * Create new {@code /data/user/[id]} directory and sets default 1915 * permissions. 1916 */ 1917 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 1918 final StorageManager storage = context.getSystemService(StorageManager.class); 1919 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1920 storage.createNewUserDir(userId, userDir); 1921 } 1922 1923 /** 1924 * Enforce that serial number stored in user directory inode matches the 1925 * given expected value. Gracefully sets the serial number if currently 1926 * undefined. 1927 * 1928 * @throws IOException when problem extracting serial number, or serial 1929 * number is mismatched. 1930 */ 1931 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 1932 final int foundSerial = getSerialNumber(file); 1933 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 1934 1935 if (foundSerial == -1) { 1936 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 1937 try { 1938 setSerialNumber(file, serialNumber); 1939 } catch (IOException e) { 1940 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 1941 } 1942 1943 } else if (foundSerial != serialNumber) { 1944 throw new IOException("Found serial number " + foundSerial 1945 + " doesn't match expected " + serialNumber); 1946 } 1947 } 1948 1949 /** 1950 * Set serial number stored in user directory inode. 1951 * 1952 * @throws IOException if serial number was already set 1953 */ 1954 private static void setSerialNumber(File file, int serialNumber) 1955 throws IOException { 1956 try { 1957 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 1958 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 1959 } catch (ErrnoException e) { 1960 throw e.rethrowAsIOException(); 1961 } 1962 } 1963 1964 /** 1965 * Return serial number stored in user directory inode. 1966 * 1967 * @return parsed serial number, or -1 if not set 1968 */ 1969 private static int getSerialNumber(File file) throws IOException { 1970 try { 1971 final byte[] buf = new byte[256]; 1972 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 1973 final String serial = new String(buf, 0, len); 1974 try { 1975 return Integer.parseInt(serial); 1976 } catch (NumberFormatException e) { 1977 throw new IOException("Bad serial number: " + serial); 1978 } 1979 } catch (ErrnoException e) { 1980 if (e.errno == OsConstants.ENODATA) { 1981 return -1; 1982 } else { 1983 throw e.rethrowAsIOException(); 1984 } 1985 } 1986 } 1987 1988 @Override 1989 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1990 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1991 != PackageManager.PERMISSION_GRANTED) { 1992 pw.println("Permission Denial: can't dump UserManager from from pid=" 1993 + Binder.getCallingPid() 1994 + ", uid=" + Binder.getCallingUid() 1995 + " without permission " 1996 + android.Manifest.permission.DUMP); 1997 return; 1998 } 1999 2000 long now = System.currentTimeMillis(); 2001 StringBuilder sb = new StringBuilder(); 2002 synchronized (mPackagesLock) { 2003 pw.println("Users:"); 2004 for (int i = 0; i < mUsers.size(); i++) { 2005 UserInfo user = mUsers.valueAt(i); 2006 if (user == null) continue; 2007 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 2008 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 2009 if (user.partial) pw.print(" <partial>"); 2010 pw.println(); 2011 pw.print(" Created: "); 2012 if (user.creationTime == 0) { 2013 pw.println("<unknown>"); 2014 } else { 2015 sb.setLength(0); 2016 TimeUtils.formatDuration(now - user.creationTime, sb); 2017 sb.append(" ago"); 2018 pw.println(sb); 2019 } 2020 pw.print(" Last logged in: "); 2021 if (user.lastLoggedInTime == 0) { 2022 pw.println("<unknown>"); 2023 } else { 2024 sb.setLength(0); 2025 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2026 sb.append(" ago"); 2027 pw.println(sb); 2028 } 2029 } 2030 } 2031 } 2032 2033 final class MainHandler extends Handler { 2034 2035 @Override 2036 public void handleMessage(Message msg) { 2037 switch (msg.what) { 2038 case WRITE_USER_MSG: 2039 removeMessages(WRITE_USER_MSG, msg.obj); 2040 synchronized (mPackagesLock) { 2041 int userId = ((UserInfo) msg.obj).id; 2042 UserInfo userInfo = mUsers.get(userId); 2043 if (userInfo != null) { 2044 writeUserLocked(userInfo); 2045 } 2046 } 2047 } 2048 } 2049 } 2050 2051 /** 2052 * @param userId 2053 * @return whether the user has been initialized yet 2054 */ 2055 boolean isInitialized(int userId) { 2056 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2057 } 2058} 2059